Buenos Aires has everything, nightlife (excellent bars and clubs), culture, art, running places, etc. Though insecurity could be an issue, it is not as high as it may seem; if you know how to get around, nothing will happen to you. It is also quite diverse in terms of LGBTTQQIAAP and there's plenty of offer to be entertained.
I see that hospitals are badly ranked in the Nomad ranking but I'd like to make a point here: public hospitals are free to use by anyone (no matter nationality nor residency status) and they are collapsed. Normally, people pay (the ones that can) around 100/110usd per month (the same way you pay in the majority of the countries) for a private health system which is excellent. So, that is not an issue at all.